<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        .box {
            width: 1534px;
            height: 768px;
            margin: 0 auto;
            background-color: skyblue;
        }
        .left {
            width: 294px;
            height: 768px;
            float: left;
            background-color: orange;
        }
        .right {
            width: 1240px;
            height: 768px;
            float: left;
        }
        .right>li {
            width: 294px;
            height: 375px;
            background-color: lightgreen;
            margin-left: 16px;
            margin-bottom: 16px;
            float: left;
            list-style: none;
        }
        .right>li:hover {
            box-shadow: 5px 5px 20px 6px gray;
        }
    </style>
</head>
     
<body>
    <div class="box">
        <div class="left">1</div>
        <div class="right">
            <li>1</li>
            <li>2</li>
            <li>3</li>
            <li>4</li>
            <li>5</li>
            <li>6</li>
            <li>7</li>
            <li>8</li>
        </div>
    </div>
</body>
</html>